Module:Coordinates

--[[ This module is intended to replace the functionality of {{#coordinates:|||||||| | |name= }} and related templates. It provides several methods, including

 : General function formatting and displaying coordinate values.

 : Simple function for converting decimal degree values to DMS format.

 : Simple function for converting DMS format to decimal degree format.

 : Export the link used to reach the tools

]]

local math_mod = require("Module:Math") local coordinates = {};

local current_page = mw.title.getCurrentTitle() local page_name = mw.uri.encode( current_page.prefixedText, 'WIKI' ); local coord_link = '//tools.wmflabs.org/geohack/geohack.php?pagename=' .. page_name .. '&params='

--[[ Helper function, replacement for Template:Coord/display/title ]] local function displaytitle(s, notes) local l = "Coordinates: " .. s local co = ''; return '' .. co .. ''; end

--[[ Helper function, Replacement for Template:Coord/display/inline ]] local function displayinline(s, notes) return s .. notes end

--Helper function, used in detecting DMS formatting local function dmsTest(first, second) if type(first) ~= 'string' or type(second) ~= 'string' then return nil end local s = (first .. second):upper() return s:find('^[NS][EW]$') or s:find('^[EW][NS]$') end

--Wrapper function to grab args, see Module:Arguments for this function's documentation. local function makeInvokeFunc(funcName) return function (frame) local args = require('Module:Arguments').getArgs(frame, { wrappers = 'Template:Coord' }) return coordinates[funcName](args) end end

--Helper function, handle optional args. local function optionalArg(arg, supplement) return arg and arg .. supplement or end

--[[ Formats any error messages generated for display ]] local function errorPrinter(errors) local result = "" for i,v in ipairs(errors) do local errorHTML = '' result = result .. errorHTML .. "
" end return result end

--[[ Determine the required CSS class to display coordinates

Usually geo-nondefault is hidden by CSS, unless a user has overridden this for himself default is the mode as specificied by the user when calling the {{#coordinates:|||||||| | |name= }} template mode is the display mode (dec or dms) that we will need to determine the css class for ]] local function displayDefault(default, mode) if default == "" then default = "dec" end

if default == mode then return "geo-default" else return "geo-nondefault" end end

--[[ specPrinter

Output formatter. Takes the structure generated by either parseDec or parseDMS and formats it for inclusion on Wikipedia. ]] local function specPrinter(args, coordinateSpec) local uriComponents = coordinateSpec["param"] if uriComponents == "" then -- RETURN error, should never be empty or nil return "ERROR param was empty" end if args["name"] then uriComponents = uriComponents .. "&title=" .. mw.uri.encode(coordinateSpec["name"]) end

local geodmshtml = '' .. '' .. coordinateSpec["dms-lat"] .. ' ' .. '' ..coordinateSpec["dms-long"] .. '' .. ''

local lat = tonumber( coordinateSpec["dec-lat"] ) or 0 local geodeclat if lat < 0 then -- FIXME this breaks the pre-existing precision geodeclat = tostring(coordinateSpec["dec-lat"]):sub(2) .. "°S" else geodeclat = (coordinateSpec["dec-lat"] or 0) .. "°N" end

local long = tonumber( coordinateSpec["dec-long"] ) or 0 local geodeclong if long < 0 then -- FIXME does not handle unicode minus geodeclong = tostring(coordinateSpec["dec-long"]):sub(2) .. "°W" else geodeclong = (coordinateSpec["dec-long"] or 0) .. "°E" end

local geodechtml = '' .. geodeclat .. ' ' .. geodeclong .. ''

local geonumhtml = '' .. coordinateSpec["dec-lat"] .. '; ' .. coordinateSpec["dec-long"] .. ''

local inner = '' .. geodmshtml .. '' .. '' .. '';

if not args["name"] then inner = inner .. geodechtml .. ' / ' .. geonumhtml .. '' else inner = inner .. '' .. geodechtml .. ' / ' .. geonumhtml .. '' .. ' (' .. args["name"] .. ')' end

return '' .. '[' .. coord_link .. uriComponents .. ' ' .. inner .. ']' .. '' end

--Helper function, convert decimal to degrees local function convert_dec2dms_d(coordinate) local d = math_mod._round( coordinate, 0 ) .. "°" return d .. "" end

--Helper function, convert decimal to degrees and minutes local function convert_dec2dms_dm(coordinate) coordinate = math_mod._round( coordinate * 60, 0 ); local m = coordinate % 60; coordinate = math.floor( (coordinate - m) / 60 ); local d = coordinate % 360 .."°"

return d .. string.format( "%02d′", m ) end

--Helper function, convert decimal to degrees, minutes, and seconds local function convert_dec2dms_dms(coordinate) coordinate = math_mod._round( coordinate * 60 * 60, 0 ); local s = coordinate % 60 coordinate = math.floor( (coordinate - s) / 60 ); local m = coordinate % 60 coordinate = math.floor( (coordinate - m) / 60 ); local d = coordinate % 360 .."°"

return d .. string.format( "%02d′", m ) .. string.format( "%02d″", s ) end

--[[ Helper function, convert decimal latitude or longitude to degrees, minutes, and seconds format based on the specified precision. ]] local function convert_dec2dms(coordinate, firstPostfix, secondPostfix, precision) local coord = tonumber(coordinate) local postfix if coord >= 0 then postfix = firstPostfix else postfix = secondPostfix end

precision = precision:lower(); if precision == "dms" then return convert_dec2dms_dms( math.abs( coord ) ) .. postfix; elseif precision == "dm" then return convert_dec2dms_dm( math.abs( coord ) ) .. postfix; elseif precision == "d" then return convert_dec2dms_d( math.abs( coord ) ) .. postfix; end end

--[[ Convert DMS format into a N or E decimal coordinate ]] local function convert_dms2dec(direction, degrees_str, minutes_str, seconds_str) local degrees = tonumber(degrees_str) local minutes = tonumber(minutes_str) or 0 local seconds = tonumber(seconds_str) or 0

local factor = 1 if direction == "S" or direction == "W" then factor = -1 end

local precision = 0 if seconds_str then precision = 5 + math.max( math_mod._precision(seconds_str), 0 ); elseif minutes_str and minutes_str ~= then precision = 3 + math.max( math_mod._precision(minutes_str), 0 ); else precision = math.max( math_mod._precision(degrees_str), 0 ); end

local decimal = factor * (degrees+(minutes+seconds/60)/60) return string.format( "%." .. precision .. "f", decimal ) -- not tonumber since this whole thing is string based. end

--[[ Checks input values to for out of range errors. ]] local function validate( lat_d, lat_m, lat_s, long_d, long_m, long_s, source, strong ) local errors = {}; lat_d = tonumber( lat_d ) or 0; lat_m = tonumber( lat_m ) or 0; lat_s = tonumber( lat_s ) or 0; long_d = tonumber( long_d ) or 0; long_m = tonumber( long_m ) or 0; long_s = tonumber( long_s ) or 0;

if strong then if lat_d < 0 then table.insert(errors, {source, "latitude degrees < 0 with hemisphere flag"}) end if long_d < 0 then table.insert(errors, {source, "longitude degrees < 0 with hemisphere flag"}) end --[[ #coordinates is inconsistent about whether this is an error. If globe: is specified, it won't error on this condition, but otherwise it will.

For not simply disable this check.

if long_d > 180 then table.insert(errors, {source, "longitude degrees > 180 with hemisphere flag"}) end ]] end

if lat_d > 90 then table.insert(errors, {source, "latitude degrees > 90"}) end if lat_d < -90 then table.insert(errors, {source, "latitude degrees < -90"}) end if lat_m >= 60 then table.insert(errors, {source, "latitude minutes >= 60"}) end if lat_m < 0 then table.insert(errors, {source, "latitude minutes < 0"}) end if lat_s >= 60 then table.insert(errors, {source, "latitude seconds >= 60"}) end if lat_s < 0 then table.insert(errors, {source, "latitude seconds < 0"}) end if long_d >= 360 then table.insert(errors, {source, "longitude degrees >= 360"}) end if long_d <= -360 then table.insert(errors, {source, "longitude degrees <= -360"}) end if long_m >= 60 then table.insert(errors, {source, "longitude minutes >= 60"}) end if long_m < 0 then table.insert(errors, {source, "longitude minutes < 0"}) end if long_s >= 60 then table.insert(errors, {source, "longitude seconds >= 60"}) end if long_s < 0 then table.insert(errors, {source, "longitude seconds < 0"}) end

return errors; end

--[[ parseDec

Transforms decimal format latitude and longitude into the a structure to be used in displaying coordinates ]] local function parseDec( lat, long, format ) local coordinateSpec = {} local errors = {}

if not long then return nil, Template:"parseDec", "Missing longitude" elseif not tonumber(long) then return nil, Template:"parseDec", "Longitude could not be parsed as a number: " .. long end

errors = validate( lat, nil, nil, long, nil, nil, 'parseDec', false ); coordinateSpec["dec-lat"] = lat; coordinateSpec["dec-long"] = long;

local mode = coordinates.determineMode( lat, long ); coordinateSpec["dms-lat"] = convert_dec2dms( lat, "N", "S", mode) -- Template:Coord/dec2dms coordinateSpec["dms-long"] = convert_dec2dms( long, "E", "W", mode) -- Template:Coord/dec2dms

if format then coordinateSpec.default = format else coordinateSpec.default = "dec" end

return coordinateSpec, errors end

--[[ parseDMS

Transforms degrees, minutes, seconds format latitude and longitude into the a structure to be used in displaying coordinates ]] local function parseDMS( lat_d, lat_m, lat_s, lat_f, long_d, long_m, long_s, long_f, format ) local coordinateSpec = {} local errors = {}

lat_f = lat_f:upper(); long_f = long_f:upper();

-- Check if specified backward if lat_f == 'E' or lat_f == 'W' then local t_d, t_m, t_s, t_f; t_d = lat_d; t_m = lat_m; t_s = lat_s; t_f = lat_f; lat_d = long_d; lat_m = long_m; lat_s = long_s; lat_f = long_f; long_d = t_d; long_m = t_m; long_s = t_s; long_f = t_f; end

errors = validate( lat_d, lat_m, lat_s, long_d, long_m, long_s, 'parseDMS', true ); if not long_d then return nil, Template:"parseDMS", "Missing longitude" elseif not tonumber(long_d) then return nil, Template:"parseDMS", "Longitude could not be parsed as a number:" .. long d end

if not lat_m and not lat_s and not long_m and not long_s and #errors == 0 then if math_mod._precision( lat_d ) > 0 or math_mod._precision( long_d ) > 0 then if lat_f:upper() == 'S' then lat_d = '-' .. lat_d; end if long_f:upper() == 'W' then long_d = '-' .. long_d; end

return parseDec( lat_d, long_d, format ); end end

coordinateSpec["dms-lat"] = lat_d.."°"..optionalArg(lat_m,"′") .. optionalArg(lat_s,"″") .. lat_f coordinateSpec["dms-long"] = long_d.."°"..optionalArg(long_m,"′") .. optionalArg(long_s,"″") .. long_f coordinateSpec["dec-lat"] = convert_dms2dec(lat_f, lat_d, lat_m, lat_s) -- Template:Coord/dms2dec coordinateSpec["dec-long"] = convert_dms2dec(long_f, long_d, long_m, long_s) -- Template:Coord/dms2dec

if format then coordinateSpec.default = format else coordinateSpec.default = "dms" end

return coordinateSpec, errors end

--[[ Check the input arguments for coord to determine the kind of data being provided and then make the necessary processing. ]] local function formatTest(args) local result, errors local primary = false

local function getParam(args, lim) local ret = {} for i = 1, lim do ret[i] = args[i] or end return table.concat(ret, '_') end

if not args[1] then -- no lat logic return errorPrinter( Template:"formatTest", "Missing latitude" ) elseif not tonumber(args[1]) then -- bad lat logic return errorPrinter( {{"formatTest", "Unable to parse latitude as a number:" .. args[1]}} ) elseif not args[4] and not args[5] and not args[6] then -- dec logic result, errors = parseDec(args[1], args[2], args.format) if not result then return errorPrinter(errors); end result.param = table.concat({args[1], 'N', args[2] or , 'E', args[3] or }, '_') elseif dmsTest(args[4], args[8]) then -- dms logic result, errors = parseDMS(args[1], args[2], args[3], args[4], args[5], args[6], args[7], args[8], args.format) if args[10] then table.insert(errors, {'formatTest', 'Extra unexpected parameters'}) end if not result then return errorPrinter(errors) end result.param = getParam(args, 9) elseif dmsTest(args[3], args[6]) then -- dm logic result, errors = parseDMS(args[1], args[2], nil, args[3], args[4], args[5], nil, args[6], args['format']) if args[8] then table.insert(errors, {'formatTest', 'Extra unexpected parameters'}) end if not result then return errorPrinter(errors) end result.param = getParam(args, 7) elseif dmsTest(args[2], args[4]) then -- d logic result, errors = parseDMS(args[1], nil, nil, args[2], args[3], nil, nil, args[4], args.format) if args[6] then table.insert(errors, {'formatTest', 'Extra unexpected parameters'}) end if not result then return errorPrinter(errors) end result.param = getParam(args, 5) else -- Error return errorPrinter(Template:"formatTest", "Unknown argument format") end result.name = args.name

local extra_param = {'dim', 'globe', 'scale', 'region', 'source', 'type'} for _, v in ipairs(extra_param) do if args[v] then table.insert(errors, {'formatTest', 'Parameter: "' .. v .. '=" should be "' .. v .. ':"' }) end end

local ret = specPrinter(args, result) if #errors > 0 then ret = ret .. ' ' .. errorPrinter(errors) .. end return ret end

--[[ Generate Wikidata tracking categories. ]] local function makeWikidataCategories() local ret if mw.wikibase and current_page.namespace == 0 then local entity = mw.wikibase.getEntityObject() if entity and entity.claims and entity.claims.P625 and entity.claims.P625[1] then local snaktype = entity.claims.P625[1].mainsnak.snaktype if snaktype == 'value' then -- coordinates exist both here and on Wikidata, and can be compared. ret = 'Coordinates on Wikidata' elseif snaktype == 'somevalue' then ret = 'Coordinates on Wikidata set to unknown value' elseif snaktype == 'novalue' then ret = 'Coordinates on Wikidata set to no value' end else -- We have to either import the coordinates to Wikidata or remove them here. ret = 'Coordinates not on Wikidata' end end if ret then return string.format(, ret) else return end end

--[[ link

Simple function to export the coordinates link for other uses.

Usage: Template:Invoke:Coordinates

]] function coordinates.link(frame) return coord_link; end

--[[ dec2dms

Wrapper to allow templates to call dec2dms directly.

Usage: Template:Invoke:Coordinates

decimal_coordinate is converted to DMS format. If positive, the positive_suffix is appended (typical N or E), if negative, the negative suffix is appended. The specified precision is one of 'D', 'DM', or 'DMS' to specify the level of detail to use. ]] coordinates.dec2dms = makeInvokeFunc('_dec2dms') function coordinates._dec2dms(args) local coordinate = args[1] local firstPostfix = args[2] or local secondPostfix = args[3] or local precision = args[4] or

return convert_dec2dms(coordinate, firstPostfix, secondPostfix, precision) end

--[[ Helper function to determine whether to use D, DM, or DMS format depending on the precision of the decimal input. ]] function coordinates.determineMode( value1, value2 ) local precision = math.max( math_mod._precision( value1 ), math_mod._precision( value2 ) ); if precision <= 0 then return 'd' elseif precision <= 2 then return 'dm'; else return 'dms'; end end

--[[ dms2dec

Wrapper to allow templates to call dms2dec directly.

Usage: Template:Invoke:Coordinates

Converts DMS values specified as degrees, minutes, seconds too decimal format. direction_flag is one of N, S, E, W, and determines whether the output is positive (i.e. N and E) or negative (i.e. S and W). ]] coordinates.dms2dec = makeInvokeFunc('_dms2dec') function coordinates._dms2dec(args) local direction = args[1] local degrees = args[2] local minutes = args[3] local seconds = args[4]

return convert_dms2dec(direction, degrees, minutes, seconds) end

--[[ coord

Main entry point for Lua function to replace {{#coordinates:|||||||| | |name= }}

Usage: Template:Invoke:Coordinates Template:Invoke:Coordinates Template:Invoke:Coordinates ...

Refer to {{#coordinates:|||||||| | |name= }} documentation page for many additional parameters and configuration options.

Note: This function provides the visual display elements of {{#coordinates:|||||||| | |name= }}. In order to load coordinates into the database, the {{#coordinates:}} parser function must also be called, this is done automatically in the Lua version of {{#coordinates:|||||||| | |name= }}. ]] coordinates.coord = makeInvokeFunc('_coord') function coordinates._coord(args) if not args[1] and not args[2] and mw.wikibase.getEntityObject() then local entity = mw.wikibase.getEntityObject() if entity and entity.claims and entity.claims.P625 and entity.claims.P625[1].mainsnak.snaktype == 'value' then local precision = entity.claims.P625[1].mainsnak.datavalue.value.precision args[1]=entity.claims.P625[1].mainsnak.datavalue.value.latitude args[2]=entity.claims.P625[1].mainsnak.datavalue.value.longitude if precision then precision=-math_mod._round(math.log(precision)/math.log(10),0) args[1]=math_mod._round(args[1],precision) args[2]=math_mod._round(args[2],precision) end end end

local contents = formatTest(args) local Notes = args.notes or local Display = args.display and args.display:lower() or 'inline'

local function isInline(s) -- Finds whether coordinates are displayed inline. return s:find('inline') ~= nil or s == 'i' or s == 'it' or s == 'ti' end local function isInTitle(s) -- Finds whether coordinates are displayed in the title. return s:find('title') ~= nil or s == 't' or s == 'it' or s == 'ti' end

local text = if isInline(Display) then text = text .. displayinline(contents, Notes) end if isInTitle(Display) then text = text .. displaytitle(contents, Notes) .. makeWikidataCategories() end return text end

return coordinates